Among them was the old "Rocker." This had a bottom about 5 feet long and 16 inches wide, with the sides about 8 inches high for half the length, and then sloped off to two inches at the end.

There was a bar about an inch high across the end to serve as a riffle, and on the higher end of this box is a stationary box 14 inches square, with sides 4 inches high and having a sheet iron bottom perforated with half inch holes.

On the bottom of the box are fastened two rockers like those on the baby cradle, and the whole had a piece of board or other solid foundation to stand on, the whole being set at an angle to allow the gravel to work off at the lower end with the water.

A cleat was fastened across the bottom to catch the gold, and this was frequently examined to see how the work was paying, and taking out such coarse pieces as could be readily seen.

To work the rocker a pan of dirt would be placed in the square screen box, and then with one hand the miner would rock the cradle while he poured water with the other from a dipper to wash the earth.